Painkiller ABT-594 from Frog
Poison from the skin of a South American frog has led to a new painkiller
more powerful than morphine yet free of morphine's side effects. The
new painkiller, ABT-594, has already been tested on animals. According
to Science News it is now being tested on humans in Europe.
ABT-594, made by Abbott Laboratories in
Chicago, seems many times more powerful than morphine. It does not impair
breathing nor cause constipation. Animals showed no signs of addiction.
The drug seems to be effective for as long as it is used.
Researchers developed ABT-594 when scientists
at the National Institutes of Health found that a poison from a frog blocked
pain 200 times more effectively than morphine.
Locks onto nicotine receptors
The frog (Epibpedobates tricolor) is found in Ecuador. Poison in
its skin protects it from predators. The poison as such is too toxic to
be used as a painkiller for humans.
NIH scientists discovered that the poison
is like nicotine. After they published a diagram of its chemical structure,
Abbott researchers saw that it resembled a set of drugs they were testing
for Alzheimer's disease. Like the frog poison, these drugs affect nicotine
receptors on nerve cells.
The drug that Abbott selected from this
group, ABT-594, is close to the frog poison (which in honor of the frog
is called epibatidine). But it is not poisonous.
In the USA, 30 to 40 million people, many
of them cancer patients, depend on morphine. This new drug looks very
promising for treating these patients.
Science News magazine for Jan. 24, 1998, p.63 says that in Europe
Abbott is testing the drug on humans.
Contact: Stephen P. Arneric
Abbot Laboratories
Pharmaceutical Products Division
Neurological and Urological Diseases Research
Abbott Park, IL 60064-3500
Abbott's
research was published in Science Jan 2 1998:
"Broad-spectrum, non-opiod analgesic activity by selective modulation
of neuronal nicotonic acetylcoline receptors." Science 279:77 Jan
1998. Science is available
on the Web by subscription.
For help with pain visit our Pain Management Links
Fond
of frogs? If you're in the mood, visit the Save Our Frogs page at Frogland
(home of the frog on this page).
May 20. 1998. Modified December 26, 1998
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